United Pilots Turn Up Heat

CHICAGO—United Airlines pilots, still simmering over what they call "inadequate" training and "compromised safety" stemming from United's 2010 merger with Continental Airlines, have ratcheted up their pressure on the carrier by circulating to members of Congress a highly critical 101-page report by their union.

The document, dated Nov. 10, lambasts United for using only individual, computer-based training to help United pilots absorb a "large volume of procedural changes, some of which are quite...